Insulated can



(No Model.) I 2 SheetsSheet 1. G. ELOLIS'BEE.

INSULATED CAN.

No. 358,732, Patented Mar. 1, 1887.

W'imasesx 2 SheetsSheet 2.

(No Model.)

c. E. CLISBBE.

INSULATED BEAN.

No. 358.732. Patented Mar. 1,1887.

nmmm.mlt

PATENT FFICE.

CLARENCE E. CLISB EE, OF BOSTON, MASSACHUSETTS.

INSULATED CAN.

SPECIFICATION forming m of Letters Patent No. 358,732, dated March 1,1887.

' Application filed October H, 1886. I Serial No: 216291. (No model.)

.To all whom it may concern:

Be it known that I, Cranmer; E. CLISBEI-l, of Boston. in the county of Sntl'olk and State of Massachusetts, have invented certain new and useful Improvements in Insulated Cans, of which the following, taken in connection with the accompanying drawings, is a specification;

The object of this invent-ion is to iurnish an improved insulated cantor coffee and other beverages, packed in its body and top to resist radiation, so that the liquid may retain its heat for twenty-four hours or more; and, also, to provide a vent-tube opened or closed by a slight rotary movement of the screw-cap, which inovementis limited, so that the cap cannot be removed by unauthorized parties. The faucet is controlled by a seal to prevent any tampering with the contents of the can.

In the drawings, Figure 1 is a vertical sec tion through my improved can; Fig. 2,2111 enlarged detail view of the top ofthe can; and Fig. 3, a like view of the body, showing its double wall and paper lining. Fig. 4 is an enlarged vertical section through the top or mouth of the can, showing the vent-tube unclosed by the turn of the screw-ca p; and Fig. 5, an external view of the top.

The body of my improved can consists of two concentric cylindrical vessels, A and I each, by preference, ofa frnsto-conical form in its upper portion. Between these vessels; at bottom and all around, the space is filled with a non-conducting filling, 0, preferably of kilndried sawdust rammed hard and firmly packed. The inner ves el, A, is of copper tinned on its inner surface to resist corrosion, while the outer vessel is of heavy tinned or galvanized sheet-iron strengthened by external hoops. Crossed supports may also re-eutorcc its bottom.

As an additional and most effective guard against radiation of heat, I apply to the entire outer surface of the inner vessel, and preferably to the inner surface of the outcomeso], one or more layers of stout paper, 1'). or equivalent non-cond uctingniaterial, and I find that by thus coating the shcctmetal body I lengthen by several hours the time during which the cotlee is kept hot as compared with the former practice without such coating.

tween E and F is packed with the filling C.

A threaded ring, G, forms the upper edge of this top.

At the lower edge or" the cylindrical part F a shoulder, H, projects inwardly to support a. cork or other non-conducting plug, I, provided with a suitable handle for lifting it out when desired. Above this plug the space is filled up to the top of the ring G with mineral wool or like packing J, either inclosed in a. bag or filled in and pressed down without such flexible receptacle. By this construction I keep the heat from radiating at the top, and the cap K, which screws onto the ring G, will remain cool for hours longer than has been possible heretofore.

L represents a vent tube secured within the cylinder F and extending from the air-space within the can up flush with the upper edge of the screwriug G. The screw-cap K has an annular flange, X, which projects inwardly and bears upon the upper end of the venttubc L, shutting off all ingress of air. A partial turn of the screw-cap opens the vent and permits the liquid to be drawn from the faucet O. I limit the movement of the cap at this point by extending a chain, 1, from it to a staple with padlock Q and a key to secure the other end to the can.

I provide a rest, R, for the faucet-handle to check its closing movement atthe proper point, and in shipping tilled cans Iatlix a. metallic seal of any suitable pattern to secure the handle to its rest, so as to guard against drawing oil the beverage in transit.

The can is provided with suitable lifting handles. The edges of the cap K are milled or roughened, and at the top I form an angular protuberance, to which a wrench may be applied. a

I claim as my invention- 1. The described can havingatop or mouth formed of thetaperiug wall E and cylinder F,

with interposed packing C and terminal screwriug G, and with shoulder II and vent-tube L, fixed within the cylinder, in combination with the plug I, the superposed packing J, and the In testimony whereof I have signed my name screw-cap K, each separately removable from to this specification, in the presence of two the canqnouth, substantially as set forth. subscribing witnesses, on-' this 8th day of Oe- 2. In an insulated can, the top provided at tober, A. D. 1886. I 5 its upper edge with the screw-ri'ngG, and having a vent-tube, L, fixed within it, in eombig CLARENCE E. CLISBEE. nation with the screw-mp K, adapted to open and close such vent, and with suitable means \Vitnesses: "of limiting the movement of the cap, for the N. H. SPEXCE l 10 purpose set forth. FRANK T. BENNER. V 

